EN 16932-2-2018 Drain and sewer systems outside buildings - Pumping systems - Part 2 Positive pressure systems.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Drain and sewer systems outside buildings - Pumping systemsPart 2: Positive pressure systemsBS EN 169322:2018National forewordThis British Standard is the UK implementation of EN 169322:2018. Together with BS EN 169321:

2、2018 and BS EN 169323:2018, it supersedes BS EN 1091:1997 and BS EN 1671:1997, which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/505/22.A list of organizations represented on this committee can be obtained on request to its secretary.This publication

3、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 90665 7ICS 93.030Compliance with a British Standard cannot confer immunity from lega

4、l obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 169322:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 16932-2April 2018IC

5、S 93.030 Supersedes EN 1671:1997, EN 1091:1996EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 169322:2018: EAll rights of exploitation in any form and by any means

6、reserved worldwide for CEN national MembersDrain and sewer systems outside buildings Pumping systems Part 2: Positive pressure systemsRseaux dvacuation et dassainissement lextrieur des btiments Systmes de pompage Partie 2: Systmes sous pressionEntwsserungssysteme auerhalb von Gebuden Pumpsysteme Tei

7、l 2: DruckentwsserungssystemeThis European Standard was approved by CEN on 22 January 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lis

8、ts and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under t

9、he responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugos

10、lav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 16932-2:2018 (E)European for

11、eword 41 Scope . 52 Normative references 53 Terms and definitions . 54 Symbols and units . 75 General 86 Planning of positive pressure systems 86.1 Type of pumping station . 86.1.1 Introduction . 86.1.2 Pumping stations with submersible pumps 96.1.3 Pumping stations with dry installed pumps .116.1.4

12、 Other types of pumping stations .116.2 Selection of type of pumping station 126.3 Route and profile of rising mains . 127 Hydraulic design of pumping systems 137.1 Introduction . 137.2 Establish inflow rates . 157.2.1 Foul wastewater pumping stations .157.2.2 Surface water pumping installations 157

13、2.3 Combined sewer pumping stations 157.3 Select desired pump flow rates 157.4 Dimensioning collection tank 157.5 Select rising main diameter 167.5.1 Pumping stations 167.5.2 Pressure sewer systems . 177.6 Retention period . 177.7 Calculation of system characteristics . 177.7.1 System head calculat

14、ion . 177.7.2 Pressure sewer systems . 207.8 Selection of pump units and duty points . 207.9 Check pressure transients (waterhammer) 228 Detailed design of pumping stations 238.1 General 238.2 Layout 238.3 Collection tank 248.4 Pump units . 258.4.1 Pumps . 258.4.2 Air compressor units .258.5 Control

15、s and electrical equipment and instrumentation 259 Septicity 269.1 General 269.2 Control of septicity . 269.2.1 General. 269.2.2 Limiting retention period 279.2.3 Air flushing .279.2.4 Chemical treatment 279.2.5 Hydrogen sulphide stripping . 279.2.6 Dilution of the septic wastewater in fresh wastewa

16、ter .2810 Testing and verification 2810.1 Pumping stations . 2810.2 Rising mains . 282Contents PageBS EN 169322:2018EN 16932-2:2018 (E)10.3 Commissioning 2811 Operation and maintenance manual 28Bibliography .30 ISO ISO pubdate year All rights reserved 3BS EN 169322:2018EN 16932-2:2018 (E)European fo

17、rewordThis document (EN 16932-2:2018) has been prepared by Technical Committee CEN/TC 165 “Waste water engineering”, the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the l

18、atest by October 2018, and conflicting national standards shall be withdrawn at the latest by October 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN not be held responsible for identifying any or all such patent rights.T

19、ogether with EN 169321:2018 and EN 169323:2018, this document supersedes EN 1091:1996 and EN 1671:1997.EN 16932, Drain and sewer systems outside buildings Pumping systems, contains the following parts: Part 1: General requirements; Part 2: Positive pressure systems; Part 3: Vacuum systems.According

20、to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gree

21、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.4BS EN 169322:2018EN 16932-2:2018 (E)1 ScopeThis European Standard specifies requirements

22、for design, construction and acceptance testing of wastewater pumping systems in drain and sewer systems outside the buildings they are intended to serve. It includes pumping systems in drain and sewer systems that operate essentially under gravity as well as systems using either positive pressure o

23、r partial vacuum.This document is applicable to positive pressure systems.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For und

24、ated references, the latest edition of the referenced document (including any amendments) applies.EN 1610:2015, Construction and testing of drains and sewersEN 120501:2015, Wastewater lifting plants for buildings and sites Part 1: Lifting plants for wastewater containing faecal matterEN 120502, Wast

25、ewater lifting plants for buildings and sites Part 2: Lifting plants for faecal-free wastewaterEN 120503, Wastewater lifting plants for buildings and sites Part 3: Lifting plants for limited applicationsEN 120504, Wastewater lifting plants for buildings and sites Part 4: Non-return valves for faecal

26、free wastewater and wastewater containing faecal matterEN 16323:2014, Glossary of wastewater engineering termsEN 169321:2018, Drain and sewer systems outside buildings Pumping systems Part 1: General requirementsEN 169332:2017, Drain and sewer systems outside buildings Design Part 2: Hydraulic desi

27、gnEN ISO 9906:2012, Rotodynamic pumps Hydraulic performance acceptance tests Grades 1, 2 and 3 (ISO 9906:2012)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in EN 16323, in EN 16932-1 and the following apply.ISO and IEC maintain terminological databases for

28、 use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obpNOTE 1 TO ENTRY Certain key definitions from EN 16323:2014 have been repeated below for clarity. The following additional ter

29、ms used in this document are defined in EN 16323:aerobic; maintenance;anaerobic; pumping station;collection tank; relevant authority;combined system; retention period;5BS EN 169322:2018EN 16932-2:2018 (E)confined space; rising main;drain; septic wastewater;dry weather flow; sewer;extraneous flow; se

30、wer system;gradient; wastewater treatment plant.infiltration; NOTE 2 TO ENTRY The following terms used in this part of this standard are defined in EN 16932-1:2018:collection chamber; pump;duty point; pump unitforwarding pump; pumping system;level sensor; vacuum station.lift station;profile; 3.1ball

31、 passagepassage where a ball with a defined diameter can pass through without deformationSOURCE: EN 120501:2015, 3.1.93.2foul wastewaterwastewater comprising domestic wastewater and/or industrial wastewaterSOURCE: EN 16323:2014, 2.1.2.63.3net positive suction headNPSH amount of the absolute value of

32、 the total head above the head equivalent to the vapour pressure of the liquid at the particular temperature, with reference to the NPSHdatum planeSOURCE: EN ISO 177691:2012, 2.2.2.13.4NPSH datum planehorizontal plane through the centre of the circle described by the external points of the entrance

33、edges of the impeller blades, in the first stage in the case of multi-stage pumpsSOURCE: EN ISO 177691:2012, 2.2.2.13.5surface waterwater from precipitation, which has not seeped into the ground and is discharged to the drain or sewer system directly from the ground or from exterior building surface

34、sSOURCE: EN 16323:2014, 2.1.1.36 BS EN 169322:2018EN 16932-2:2018 (E)3.6wastewaterwater composed of any combination of water discharged from domestic, industrial or commercial premises, surface run-off and accidentally any sewer infiltration waterSOURCE: EN 16323:2014, 2.3.10.654 Symbols and unitsa

35、wave speed of pressure transients, in metres per second m/sD internal diameter of the pipe (bore), in metres mDiinternal diameter of the pipe (bore) in section i, in metres mEPelastic modulus of the pipe material, in Newtons per square metre N/m2EWelastic modulus of wastewater, in Newtons per square

36、 metre N/m2f maximum permitted frequency of pump starts per hour 1/hg acceleration due to gravity, in metres per second squared m/s2Hstotal head of the system, in metres mHptotal head at the pump unit, in metres mHArequired pump head in an air flushed rising main, or a rising main where air or gas a

37、ccumulation can occur, in metres mhflocal head loss in the bends, valves and other fittings, in metres mhlhead loss, in metres mhphead loss due to friction in the pipe, in metres mhz,rmlevel difference between the end of the rising main and pump unit(s), in metres mhA,isum of the level differences o

38、f all downsloping sections in the rising main which can be filled with air or gas, (i.e. the level differences between all their high and subsequent low points), in metres mhzhydrostatic head, in metres mkpsum of the local head loss coefficients in bends, valves and other fittings in the pipeline (d

39、imensionless) -kp,isum of the local head loss coefficients in bends, valves and other fittings in section i, dimensionless L length of the pipeline, in metres mLilength of section i of the rising main, in metres mLtlength of the pipeline before or after a closing device, in metres mLA,isum of the le

40、ngths of the downsloping sections in section i, which can be filled with air, in metres mPPpower consumption of the pump unit, in Watts W7BS EN 169322:2018EN 16932-2:2018 (E)pmaxJoukowski surge pressure, in Pascals PaQppump flow rate, in cubic metres per second m3/sQpmmean capacity of the active pum

41、p between switch on and switch off levels for the pump, in cubic metres per hour m3/hs wall thickness of the pipe, in metres mtRreflection period of the pressure wave, in seconds sVcworking volume of the collection tank, which is the volume between the lowest pump switch on level and the lowest swit

42、ch off level, in cubic metres m3v velocity in the direction of flow averaged across the flow cross-section, in metres per second m/sv ARvelocity needed for air removal, in metres per second m/svivelocity of the design wastewater flow in section i, in metres per second m/sv change in flow velocity, i

43、n metres per second m/s angle of the downsloping section downstream of a high point, in degreesPefficiency of the pump unit, dimensionless - friction coefficient, which is the pipeline headloss per unit length, dimensionless -ifriction coefficient in section i, dimensionless - lateral contraction co

44、efficient of the pipe material, dimensionless - density of wastewater, in kilogrammes per cubic metre kg/m35 GeneralThis European Standard shall be read in conjunction with EN 169321. Positive pressure systems shall comply with the requirements of EN 169321 as well as the requirements of this Europe

45、an Standard.6 Planning of positive pressure systems6.1 Type of pumping station6.1.1 IntroductionTypical pumping station types include the following: pumping stations with submersible pumps; pumping stations with dry installed pumps; pumping stations with screw pumps; pumping assemblies; ejector tank

46、 stations.8 BS EN 169322:2018EN 16932-2:2018 (E)6.1.2 Pumping stations with submersible pumpsPumping stations with submersible pumps are the most common type of pumping stations in drain and sewer systems. They comprise one or more submersible rotodynamic pump units in a collection tank. The pump un

47、its are connected to the rising main using fittings that allow the pump units to be removed from, and replaced in the collection tank from the surface without the need for personnel to enter the collection tank.Key1 collection tank 4 nonreturn valve2 pump unit 5 isolating valve (alternative position

48、s shown)3 level sensor (pressure sensor shown, other methods are possible)6 controls and electrical equipment and instrumentation cabinetFigure 1 Example of pumping station with submersible pumps and no external valve chamberThe non-return valves can be installed either in the collection tank (see F

49、igure 1) or in an adjacent valve chamber (see Figure 2), allowing easier access for maintenance. Isolating valves can be buried directly in the ground or installed in the collection tank (see Figure 1), or installed in a separate valve chamber (see Figure 2). The choice depends on the anticipated frequency of maintenance and the availability of access. The position of non-return valves